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|A Geologic Walking Tour of Building Stones of Downtown Baltimore, Maryland||contact: Dale Shelton (firstname.lastname@example.org)|
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STOP 3: BANK OF AMERICA BUILDING - 10 Light Street
Walk north on the west (left) side of Light Street and continue across Redwood Street. The Bank of America Building, on the northwest corner of Light and Redwood Streets, shows an outstanding example of Indiana Limestone. This stone, which is quarried in central Indiana, is called Indiana Limestone in the quarrying and building trade, but is known as Salem Limestone by geologists. Indiana Limestone formed over 300 million years ago during the Mississippian geological time period.
Indiana Limestone is a sedimentary rock formed by the cementation of broken shells and hard skeletal fragments of ancient marine organisms (Figure 3). Notice that some of the smaller fragments appear to have weathered away leaving behind the larger fossils. The cementing material also appears to have weathered faster, owing to its lesser durability.
This limestone is a popular building stone with high durability and ease of cutting and etching. Indiana Limestone was used in the National Cathedral and the U.S. Holocaust Memorial Museum in Washington D.C. More examples of Indiana Limestone can be seen in this walking tour at Stops 7 and 8.
Bank of America Building
10 Light St,
28 Baltimore, MD 21202
3: Indiana Limestone (also known as Salem
Limestone) on the exterior of the Bank of America building.
This pamphlet was prepared by
Sherry McCann-Murray, with contributions and photography by the Environmental
Geology and Mineral Resources Program of the Maryland Geological Survey.
Adapted for the Internet from Educational Series No. 10. For more information see Building Stones of Maryland .
Compiled by the Maryland Geological Survey, 2300 St. Paul Street, Baltimore, MD 21218
This electronic version of "A Brief Description of the Geology of Maryland " was prepared by Bob Conkwright, Division of Coastal and Estuarine Geology, Maryland Geological Survey. Please send comments on this page to Dale Shelton (email@example.com)
State of Maryland
Department of Natural Resources, Resource Assessment Service